I have my 8 week old puppies on Science Diet for Puppies because of the thread I read on here about some dog foods. This one is natural and doesn't start out with a corn base. But I just read a post on "Maddie's" thread about someone having a dog allergic to the Science Diet. I know different dogs can be allergic to different things, but does anyone know if it is more common with the Science Diet? I really don't want to do ANYTHING to harm my puppies